C480 Should I Leave or Not

"What's wrong?"

Yan Wan asked in confusion. The cotton swab stopped two to three centimeters away from Gu Chen's face.

Yan Molin looked at the two of them again and then said faintly, "This is K5."

Seeing that Yan Wan was still puzzled, Yan Molin explained kindly, "It's used to clean wounds and rotting meat. If you touch the skin, it will melt immediately."

Yan Wan's hand trembled in fright